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Sendable conformances for source compatibility. If conformance lookup always prefers the conformance from the defining module, libraries introducing unavailable Sendable conformances can break source in clients that declare retroactive Sendable conformances. Instead, still prefer the available conformance, and always diagnose the client conformance as redundant (as a warning). Then, when the retroactive conformance is removed, the errors will surface, so the programmer has to take explicit action to experience the source break.
10 lines
206 B
Swift
10 lines
206 B
Swift
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public class NonSendableClass {}
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@available(*, unavailable)
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extension NonSendableClass: @unchecked Sendable {}
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public struct SendableStruct: Sendable {}
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public struct AnotherSendableStruct: Sendable {}
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